Demountable rim.



A. MQPHERSON.

DEMOUNTABLE RIM.

APPLIOATION FILED NOV. 25, 1912.

Pat ented Sept. 16,1913.

Suucutor AMI ILL? M Phehsofl 2 SHEETS-SHEET 1.

un messes A. MnPHERSON. DEMOUNTABLB RIM. APPLICATION FILED NOV. 25,1912.

, UNITED I STATES PATENT OFFICE;

ARTHUR MGPHERSON, OF BEAUMONT, TEXAS.

DEMOUNTABLE RIM.

Application filed Itiovember 25, 1912.

T 0 all whom it may concern:

Be it known that 1, Armor: MoPnnnsoN, a citizen of the United States,residing at Beaumont, in the county of Jefferson and State of Texas,have invented certain new and useful Improvements in Demountable Rims;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart. to which appertains to make and use the same.

This invention relates to demounta'ble rims for vehicle wheels.

One object of the invention is to provide a rim of this character formedin separable sections and having an improved means for detachablyconnecting the sections whereby they may be readily separated forremoval from or application to a tire without danger of injuring thelatter.

Another object is to provide a rim of this character which will besimple, strong, durable and inexpensive in construction, eflicient andreliable in operation and well adapted to the purpose for which it isdesigned.

WVith these and other objects in view, the invention consists of certainnovel features of construction, and the combination and arrangement ofparts as will be more fully described and claimed,

In the accompanying drawings: Figure 1 is a vertical sectional viewthrough the folly and rim of a wheel and through my improved rim and thetire held thereby on the wheel; Fig. 2 is a perspective view of the rimremoved from the wheel showing the sections thereof in operativeengagement;

Fig. 3 is a similar view showing the sections separated as when beingremoved from or engaged with a tire: Fig. 4: is an enlarged crosssectional view through the folly of a wheel and through my improved rimillustrating one way in which the rim may be fastened to the wheel; Fig.5 is a detail perspective view of the locking ring for fasted ing thetwo sections of the rim together.

My improved demountable rim is constructed in two sections 1 and 2 eachof which is in the form of an annular band having on its outer edge atire gripping flange 3. The inner edge of the band or sec tion 1 hasformed therein series of inwardly extending rectangular notches 4: whichare Specification of Letters Patent.

Serial No. 733,486.

spaced equal distances apart around the Patented Sept. 16, 1 913 bandand form an annular series of lugs In the inner edge of the band orsection 2 are also formed an annular series of notches 6 correspondingto the notches 4 and forming an annular series of equally spaced lugs 7.The lugs 7 of the section 2 are disposed opposite to the notches l inthe section 1 while the notches 6 in the section 2 are disposed oppositethe lugs 5 of the section 1 whereby when the sections are broughttogether in operative engagement, said lugs and notches will fit intoeach other and form an interlocking connection between the two sectionsor bands of the rim.

In the inner sides of the lugs 5 of the section 1 are formed rectangularrecesses 8 while in the lugs 7 of the section 2 are formed similarrecesses 9. \Vhen the sections 1 and 2 are brought together in operativeengagement the notches S and 9 in the lugs :"i and 7 will be inlongitudinal alinement and with said alincd notches is adapted to beengaged a locking ring 10 whereby the sections of the rim are securelylocked together in operative engagement with the inner side of the tire.The locking ring 10 is of somewhat less diameter than the diameter ofthe recess formed by the notches 8 and 9 with which the ring is engagedand said ring is adapted to be expanded or sprung outwardly intoengagement with the recess formed by said notches and is held inoperative engagement with the recess by a lug 1.]. formed on the inneredge of'tlie section 2 and which is adapted to be engaged with a notch12 in the adjacent edge of the section 1 between two of the lugs 5thereon, said lug 11 thus forming a stop with which the ends of thelocking ring 10 are engaged and which holds said ring expanded and inoperative engagement with the notches in the lugs 5 and 7 of the rimsections. In the lug 11 is preferably formed an aperture 13 throughwhich the inflating tube and valve of the tire projects.

By constructing my improved rim in the manner described it will be seenthat the same may be readily applied to the inner side of a tire bysimply bringing the sections of the rim together in interlockingengagement and applying the locking ring thereto in the mannerdescribed. In removing the rim from the tire it is simply necessary todisengage the locking ring 10 and to slip the sections of the rimlaterally from the opposite sides of the tire thus removing ordisengaging the rim Without imparting any friction or to otherwiseinjuring the inner surface of the tire.

In practice it is intended that the rims shall be applied to the tiresin the manner described and the latter inflated and kept in engagementwith the rims until needed at which time the tire and rim may be readilyengaged with a Wheel or take the place of the tire removed. therefrom;Any suitable means may be employed for fastening the rim and tire to thewheel one form of fastening being shown in Fig. i of the drawings, butas the same forms no part of the present invention a description therepfis not thought to be necessary;

From the foregoing description taken in connection with the accompanyingdrawings, the construction and operation of the invention will bereadily understood Without requiring a more extended explanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to Without departing from the principle orsacrificing any of the advantages oi the invention as claimed.

the notches pair of. a tire en-- fingers, theof the other sectlon, saidfingers having Iongitudinally alined recesses on their inner faces toform an annular channel When-the sections are assembled, a resilientsplit locki ng ring adapted to fit in said channel, said 7 ring being ofless diameter thanthe diameter of saidchannehga lug formed on the inneredge of one rim section and the other rim section having a notch toreceive said lug, said lug extending across the channel in the fingersand forming a stop for engagement by the ends of said locking ring,whereby said ring is held'in expanded operative en ga gemcnt in saidchannel. 7 In testimony whereof I havehereunto set my hand in" presenceof two subscribing Witnesses.

ARTHUR IvlkiPHERSOII.

Witnesses W. M. Cnoon,

MARION Coins.

